TM 1-1520-264-23
6.34.3.8
Demagnetization. With the switch remaining in the AC position, place the probe/yoke legs in the same
position used for magnetizing. Press the test switch and withdraw the probe/yoke from the part for a distance of two feet
before releasing the switch.
6.34.4
Backup Method. None required.
6.34.5
System Securing. Clean the pilot/CPG directional control pedal release shaft thoroughly to remove all residual
magnetic particle media. Refer to Post Cleaning and Restoration of Part or Area After NDI, paragraph 1.4.16. The
pilot/CPG directional control pedal release shaft, if removed, requires installation in accordance with the applicable
technical manuals listed in Table 1-1.
6.35
PILOT/CPG DIRECTIONAL CONTROL PEDAL RELEASE NUTS (MT).
6.35.1
Description (Figure 6-1. Index No. 35). The pilot and CPG directional control pedal release nuts connect the
pedal release handles to the shafts. Each is similar in design and function.
6.35.2
Defects. This inspection is used to verify crack indications found visually on the pilot/CPG directional control
pedal release nuts. No cracks are allowed.
6.35.3
Primary Method. Magnetic Particle.
6.35.3.1
NDI Equipment and Materials. (Refer to Appendix B.)
a.
Magnetic Particle Inspection Probe/Yoke
b.
Magnetometer
c.
Black Light
d.
Fluorescent Magnetic Particles, refer to Table 1-8
e.
Consumable Materials, refer to Table 1-8
f.
Aircraft Marking Pencil, refer to Table 1-8
NOTE
Hand-held magnetic coil may be used. Refer to paragraph 1.4.8.1.2 and Figure 1-6.
6.35.3.2
Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance. A partial inspection
for cause (visual indications, sites of mechanical damage, corrosion, etc.) may be performed on all exposed surfaces of
the installed part using this procedure. If required, the pilot/CPG directional control pedal release nuts shall be removed
in accordance with the applicable technical manuals listed in Table 1-1.
6.35.3.3
Access. Access is through the center console panels (Figure 1-4, Items PL3 and PR4).
6.35.3.4
Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,
paragraph 1.4.4.
6.35.3.5
NDI Equipment Settings. Refer to Magnetic Particle Method, paragraph 1.4.8.
6-75
